Lucy Foley's Murder at the Grand Alpine Hotel arrives bearing the full weight of Christie's estate's confidence and the full peril of being the first Miss Marple continuation novel. The Belgian detective has always been easier to ventriloquise — Poirot's mannerisms are practically a checklist — so Foley's choice to take Miss Marple into the Swiss Alps is the right instinct, cutting her loose from St Mary Mead's cosy familiarity. The problem is structural: four rotating narrators dilute the observational intimacy that makes Miss Marple work, and the information-withholding required to sustain them tips into the same trick Christie used in Roger Ackroyd without the shock payoff. When the hotel finally gets snowed in and Miss M gets to actually detect, the novel earns its keep — but you'll wait nearly half the book to get there. Janice Hallett's The Silent Appeal is the more assured formal performance of the two Christie tributes. Reuniting the Fairway Players from The Appeal, with the in-story production now being Christie's own The Hollow, Hallett pulls off a neat recursion: a Christie adaptation as both plot mechanism and ironic mirror. The epistolary method — emails, online messages, police reports — requires a reader willing to work with the form rather than against it, but for those readers the payoff is real. These documents are variously funny, sour, and unexpectedly moving; the casting feuds and marital suspicions feel genuinely observed, not planted. The plot earns the setup. William Boyd's Cold Sunset is the third Gabriel Dax novel, and by now the series has found its rhythm: 1964 period detail worn lightly, tradecraft improving incrementally, and Dax's besotted, professionally compromised relationship with MI6 handler Faith Green providing most of the dramatic irony. The Bletchley Park double-agent cold case gives way to a Moscow exfiltration mission that goes sideways in ways readers of the genre will half-anticipate. What makes this series worth following is Boyd's comedy — the Hampstead dinner party of self-important literati is genuinely sharp — and his patience with character. Read in order. The outlier in the roundup, and the one most likely to outlast it, is T Geronimo Johnson's The Occidental Book of the Dead. What looks like a police procedural — Black officer George Washington Jonson, his redneck partner, a dead white teenager, an Atlanta corruption investigation — turns into something structurally more ambitious in its second half, when Jonson delivers his own version of events against the film that was made about them. The film got the facts mostly right but excised the discomfort: internalised racism, overlapping identities, the mess of actual people. Johnson's move is to make that gap the subject. This is the book in the roundup doing the most original work. Eva Björg Ægisdóttir closes the Forbidden Iceland series with The Last Tenant, a dual-timeline investigation anchored in the small west-coast town of Akranes. Two skeletons at an abandoned farmhouse — a woman and a child, buried years apart — run alongside present-day single mother Karitas and her increasingly unsettling landlord. The atmospheric work is strong, the sense of accumulated rural secrets entirely convincing, and the personal pressure on Detective Elma (partner infidelity; domestic distraction) gives the procedural mechanics something to push against. Series finales carry the burden of resolution, and this one handles it with care.
